Deprecate LogCB in favor of using MediaLog

media/base/media_log.cc

Index: media/base/media_log.cc
diff --git a/media/base/media_log.cc b/media/base/media_log.cc
index f5f58de73f47c8a2320fa8a91c067d8c26dc2f98..754a5f924cee03f1dd8476993660f47165aeb199 100644
--- a/media/base/media_log.cc
+++ b/media/base/media_log.cc
@@ -271,20 +271,14 @@ void MediaLog::SetTimeProperty(
   AddEvent(event.Pass());
 }
 
-LogHelper::LogHelper(MediaLog::MediaLogLevel level, const LogCB& log_cb)
-    : level_(level), log_cb_(log_cb) {
-}
-
 LogHelper::LogHelper(MediaLog::MediaLogLevel level,
                      const scoped_refptr<MediaLog>& media_log)
     : level_(level), media_log_(media_log) {
+  DCHECK(media_log_.get());
 }
 
 LogHelper::~LogHelper() {
-  if (!log_cb_.is_null())
-    log_cb_.Run(level_, stream_.str());
-  else if (media_log_)
-    media_log_->AddLogEvent(level_, stream_.str());
+  media_log_->AddLogEvent(level_, stream_.str());
 }
 
 }  //namespace media